PowerDesigner建模时CDM与PDM的转换原则

The Principles of Conversion from CDM to PDM while Creating Database Model with PowerDesigner

介绍了如何利用E-R图建立概念数据模型(CDM),如何将概念数据模型 转换为物理数据模型(PDM),阐述了使用PowerDesigner将概念数据模型转换为物理数 据模型的基本原则.

The paper introduces how to use E - R to build CDM and how to convert CDM to PDM, also illustrates the basic principles of the conversion from CDM to PDM with PowerDesigner.